Edit topic fails when MIN_INSYNC_REPLICAS_CONFIG is not present

[tmgstevens]

Describe the bug
When using non-Kafka implementations that don't have the concept of ISR, you cannot edit a topic

To Reproduce
Steps to reproduce the behavior:

1. Deploy Redpanda (https://docs.redpanda.com/current/get-started/quick-start/?tab=tabs-1-single-broker)
2. Connect to Redpanda kaskade admin -b localhost:9092
3. Create topic
4. Edit topic

Expected behavior
Not crash

Screenshots

╭──────────────────────────────────────── Traceback (most recent call last) ─────────────────────────────────────────╮
│ /opt/homebrew/Cellar/kaskade/2.2.0/libexec/lib/python3.12/site-packages/kaskade/admin.py:432 in action_edit        │
│                                                                                                                    │
│   429 │   │   edit_topic_screen = EditTopicScreen(                                                                 │
│   430 │   │   │   self.current_topic.name,                                                                         │
│   431 │   │   │   str(self.current_topic.partitions_count()),                                                      │
│ ❱ 432 │   │   │   topic_configs[MIN_INSYNC_REPLICAS_CONFIG],                                                       │
│   433 │   │   │   topic_configs[CLEANUP_POLICY_CONFIG],                                                            │
│   434 │   │   │   topic_configs[RETENTION_MS_CONFIG],                                                              │
│   435 │   │   )                                                                                                    │
│                                                                                                                    │
│ ╭────────────────────────── locals ───────────────────────────╮                                                    │
│ │          self = ListTopics()                                │                                                    │
│ │ topic_configs = {                                           │                                                    │
│ │                 │   'compression.type': 'producer',         │                                                    │
│ │                 │   'cleanup.policy': 'delete',             │                                                    │
│ │                 │   'segment.bytes': '134217728',           │                                                    │
│ │                 │   'retention.ms': '604800000',            │                                                    │
│ │                 │   'retention.bytes': '-1',                │                                                    │
│ │                 │   'message.timestamp.type': 'CreateTime', │                                                    │
│ │                 │   'max.message.bytes': '1048576',         │                                                    │
│ │                 │   'write.caching': 'true',                │                                                    │
│ │                 │   'flush.bytes': '262144',                │                                                    │
│ │                 │   'flush.ms': '100',                      │                                                    │
│ │                 │   ... +8                                  │                                                    │
│ │                 }                                           │                                                    │
│ ╰─────────────────────────────────────────────────────────────╯                                                    │
╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
KeyError: 'min.insync.replicas'

Desktop (please complete the following information):

• OS: iOS
• Version 12.5.1
• Python Version 3.12

Additional context
Add any other context about the problem here.

[sauljabin]

hi @tmgstevens thanks!, fixing it now